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Event-Driven Architecture in Golang

Event-Driven Architecture in Golang

By : Michael Stack
4.9 (11)
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Event-Driven Architecture in Golang

Event-Driven Architecture in Golang

4.9 (11)
By: Michael Stack

Overview of this book

Event-driven architecture in Golang is an approach used to develop applications that shares state changes asynchronously, internally, and externally using messages. EDA applications are better suited at handling situations that need to scale up quickly and the chances of individual component failures are less likely to bring your system crashing down. This is why EDA is a great thing to learn and this book is designed to get you started with the help of step-by-step explanations of essential concepts, practical examples, and more. You’ll begin building event-driven microservices, including patterns to handle data consistency and resiliency. Not only will you learn the patterns behind event-driven microservices but also how to communicate using asynchronous messaging with event streams. You’ll then build an application made of several microservices that communicates using both choreographed and orchestrated messaging. By the end of this book, you’ll be able to build and deploy your own event-driven microservices using asynchronous communication.
Table of Contents (18 chapters)
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1
Part 1: Event-Driven Fundamentals
5
Part 2: Components of Event-Driven Architecture
12
Part 3: Production Ready

Adding a new order search module

Now that we are publishing the application state as it changes, we can consider new functionality that might have been impossible before or would have been too dependent on others to be feasible.

We will be consuming many different sources to keep a local cache to provide greater detail for our search results. Customer, store, and product names will all be stored locally. The new module will be consuming every message that the Order Processing module will be publishing to keep results current. Other data could also be included later, such as the status of the invoice, or the status of the shopping that takes place after the order has been submitted.

Figure 7.13 – The data that feeds the Search module

We will create the new module in a new directory called /search, and in that directory, we will create the module.go file exactly like the other modules. This new module will need the following driven adapters in the composition...

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